Question

Where does the exchange of oxygen, nutrients, and wastes occur?. a. in capillaries. b. in arteries. c. in the lungs. d. in the atria

Answer 1

The exchange of the oxygen, nutrients, and wastes occur in the capillaries. This makes these veins very important in the closed circulatory system. By this, the capillaries also have high concentration of oxygen and nutrients. Thus, the answer is letter A.